* $Id: mad.c 5596 2006-03-03 01:00:07Z sean.hefty $
*/
#include <linux/dma-mapping.h>
+#include <rdma/ib_cache.h>
#include "mad_priv.h"
#include "mad_rmpp.h"
MODULE_AUTHOR("Hal Rosenstock");
MODULE_AUTHOR("Sean Hefty");
-
-kmem_cache_t *ib_mad_cache;
+static kmem_cache_t *ib_mad_cache;
static struct list_head ib_mad_port_list;
static u32 ib_mad_client_id = 0;
if (!is_vendor_oui(mad_reg_req->oui))
goto error1;
}
+ /* Make sure class supplied is consistent with RMPP */
+ if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) {
+ if (rmpp_version)
+ goto error1;
+ }
/* Make sure class supplied is consistent with QP type */
if (qp_type == IB_QPT_SMI) {
if ((mad_reg_req->mgmt_class !=
INIT_WORK(&mad_agent_priv->local_work, local_completions,
mad_agent_priv);
atomic_set(&mad_agent_priv->refcount, 1);
- init_waitqueue_head(&mad_agent_priv->wait);
+ init_completion(&mad_agent_priv->comp);
return &mad_agent_priv->agent;
mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp;
mad_snoop_priv->agent.port_num = port_num;
mad_snoop_priv->mad_snoop_flags = mad_snoop_flags;
- init_waitqueue_head(&mad_snoop_priv->wait);
+ init_completion(&mad_snoop_priv->comp);
mad_snoop_priv->snoop_index = register_snoop_agent(
&port_priv->qp_info[qpn],
mad_snoop_priv);
}
EXPORT_SYMBOL(ib_register_mad_snoop);
+static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
+{
+ if (atomic_dec_and_test(&mad_agent_priv->refcount))
+ complete(&mad_agent_priv->comp);
+}
+
+static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv)
+{
+ if (atomic_dec_and_test(&mad_snoop_priv->refcount))
+ complete(&mad_snoop_priv->comp);
+}
+
static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
{
struct ib_mad_port_private *port_priv;
flush_workqueue(port_priv->wq);
ib_cancel_rmpp_recvs(mad_agent_priv);
- atomic_dec(&mad_agent_priv->refcount);
- wait_event(mad_agent_priv->wait,
- !atomic_read(&mad_agent_priv->refcount));
+ deref_mad_agent(mad_agent_priv);
+ wait_for_completion(&mad_agent_priv->comp);
kfree(mad_agent_priv->reg_req);
ib_dereg_mr(mad_agent_priv->agent.mr);
atomic_dec(&qp_info->snoop_count);
spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
- atomic_dec(&mad_snoop_priv->refcount);
- wait_event(mad_snoop_priv->wait,
- !atomic_read(&mad_snoop_priv->refcount));
+ deref_snoop_agent(mad_snoop_priv);
+ wait_for_completion(&mad_snoop_priv->comp);
kfree(mad_snoop_priv);
}
spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent,
send_buf, mad_send_wc);
- if (atomic_dec_and_test(&mad_snoop_priv->refcount))
- wake_up(&mad_snoop_priv->wait);
+ deref_snoop_agent(mad_snoop_priv);
spin_lock_irqsave(&qp_info->snoop_lock, flags);
}
spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent,
mad_recv_wc);
- if (atomic_dec_and_test(&mad_snoop_priv->refcount))
- wake_up(&mad_snoop_priv->wait);
+ deref_snoop_agent(mad_snoop_priv);
spin_lock_irqsave(&qp_info->snoop_lock, flags);
}
spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
}
EXPORT_SYMBOL(ib_create_send_mad);
+int ib_get_mad_data_offset(u8 mgmt_class)
+{
+ if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM)
+ return IB_MGMT_SA_HDR;
+ else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
+ (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
+ (mgmt_class == IB_MGMT_CLASS_BIS))
+ return IB_MGMT_DEVICE_HDR;
+ else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
+ (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))
+ return IB_MGMT_VENDOR_HDR;
+ else
+ return IB_MGMT_MAD_HDR;
+}
+EXPORT_SYMBOL(ib_get_mad_data_offset);
+
+int ib_is_mad_class_rmpp(u8 mgmt_class)
+{
+ if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) ||
+ (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
+ (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
+ (mgmt_class == IB_MGMT_CLASS_BIS) ||
+ ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
+ (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)))
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(ib_is_mad_class_rmpp);
+
void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num)
{
struct ib_mad_send_wr_private *mad_send_wr;
free_send_rmpp_list(mad_send_wr);
kfree(send_buf->mad);
- if (atomic_dec_and_test(&mad_agent_priv->refcount))
- wake_up(&mad_agent_priv->wait);
+ deref_mad_agent(mad_agent_priv);
}
EXPORT_SYMBOL(ib_free_send_mad);
goto error;
}
+ if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) {
+ if (mad_agent_priv->agent.rmpp_version) {
+ ret = -EINVAL;
+ goto error;
+ }
+ }
+
/*
* Save pointer to next work request to post in case the
* current one completes, and the user modifies the work
(rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA);
}
+static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr,
+ struct ib_mad_recv_wc *rwc)
+{
+ return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class ==
+ rwc->recv_buf.mad->mad_hdr.mgmt_class;
+}
+
+static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv,
+ struct ib_mad_send_wr_private *wr,
+ struct ib_mad_recv_wc *rwc )
+{
+ struct ib_ah_attr attr;
+ u8 send_resp, rcv_resp;
+ union ib_gid sgid;
+ struct ib_device *device = mad_agent_priv->agent.device;
+ u8 port_num = mad_agent_priv->agent.port_num;
+ u8 lmc;
+
+ send_resp = ((struct ib_mad *)(wr->send_buf.mad))->
+ mad_hdr.method & IB_MGMT_METHOD_RESP;
+ rcv_resp = rwc->recv_buf.mad->mad_hdr.method & IB_MGMT_METHOD_RESP;
+
+ if (send_resp == rcv_resp)
+ /* both requests, or both responses. GIDs different */
+ return 0;
+
+ if (ib_query_ah(wr->send_buf.ah, &attr))
+ /* Assume not equal, to avoid false positives. */
+ return 0;
+
+ if (!!(attr.ah_flags & IB_AH_GRH) !=
+ !!(rwc->wc->wc_flags & IB_WC_GRH))
+ /* one has GID, other does not. Assume different */
+ return 0;
+
+ if (!send_resp && rcv_resp) {
+ /* is request/response. */
+ if (!(attr.ah_flags & IB_AH_GRH)) {
+ if (ib_get_cached_lmc(device, port_num, &lmc))
+ return 0;
+ return (!lmc || !((attr.src_path_bits ^
+ rwc->wc->dlid_path_bits) &
+ ((1 << lmc) - 1)));
+ } else {
+ if (ib_get_cached_gid(device, port_num,
+ attr.grh.sgid_index, &sgid))
+ return 0;
+ return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw,
+ 16);
+ }
+ }
+
+ if (!(attr.ah_flags & IB_AH_GRH))
+ return attr.dlid == rwc->wc->slid;
+ else
+ return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw,
+ 16);
+}
+
+static inline int is_direct(u8 class)
+{
+ return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE);
+}
+
struct ib_mad_send_wr_private*
-ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, __be64 tid)
+ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv,
+ struct ib_mad_recv_wc *wc)
{
- struct ib_mad_send_wr_private *mad_send_wr;
+ struct ib_mad_send_wr_private *wr;
+ struct ib_mad *mad;
- list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list,
- agent_list) {
- if (mad_send_wr->tid == tid)
- return mad_send_wr;
+ mad = (struct ib_mad *)wc->recv_buf.mad;
+
+ list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) {
+ if ((wr->tid == mad->mad_hdr.tid) &&
+ rcv_has_same_class(wr, wc) &&
+ /*
+ * Don't check GID for direct routed MADs.
+ * These might have permissive LIDs.
+ */
+ (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) ||
+ rcv_has_same_gid(mad_agent_priv, wr, wc)))
+ return wr;
}
/*
* It's possible to receive the response before we've
* been notified that the send has completed
*/
- list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
- agent_list) {
- if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) &&
- mad_send_wr->tid == tid && mad_send_wr->timeout) {
+ list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) {
+ if (is_data_mad(mad_agent_priv, wr->send_buf.mad) &&
+ wr->tid == mad->mad_hdr.tid &&
+ wr->timeout &&
+ rcv_has_same_class(wr, wc) &&
+ /*
+ * Don't check GID for direct routed MADs.
+ * These might have permissive LIDs.
+ */
+ (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) ||
+ rcv_has_same_gid(mad_agent_priv, wr, wc)))
/* Verify request has not been canceled */
- return (mad_send_wr->status == IB_WC_SUCCESS) ?
- mad_send_wr : NULL;
- }
+ return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
}
return NULL;
}
struct ib_mad_send_wr_private *mad_send_wr;
struct ib_mad_send_wc mad_send_wc;
unsigned long flags;
- __be64 tid;
INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
mad_recv_wc);
if (!mad_recv_wc) {
- if (atomic_dec_and_test(&mad_agent_priv->refcount))
- wake_up(&mad_agent_priv->wait);
+ deref_mad_agent(mad_agent_priv);
return;
}
}
/* Complete corresponding request */
if (response_mad(mad_recv_wc->recv_buf.mad)) {
- tid = mad_recv_wc->recv_buf.mad->mad_hdr.tid;
spin_lock_irqsave(&mad_agent_priv->lock, flags);
- mad_send_wr = ib_find_send_mad(mad_agent_priv, tid);
+ mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc);
if (!mad_send_wr) {
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
ib_free_recv_mad(mad_recv_wc);
- if (atomic_dec_and_test(&mad_agent_priv->refcount))
- wake_up(&mad_agent_priv->wait);
+ deref_mad_agent(mad_agent_priv);
return;
}
ib_mark_mad_done(mad_send_wr);
} else {
mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
mad_recv_wc);
- if (atomic_dec_and_test(&mad_agent_priv->refcount))
- wake_up(&mad_agent_priv->wait);
+ deref_mad_agent(mad_agent_priv);
}
}
mad_send_wc);
/* Release reference on agent taken when sending */
- if (atomic_dec_and_test(&mad_agent_priv->refcount))
- wake_up(&mad_agent_priv->wait);
+ deref_mad_agent(mad_agent_priv);
return;
done:
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
local = list_entry(mad_agent_priv->local_list.next,
struct ib_mad_local_private,
completion_list);
+ list_del(&local->completion_list);
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
if (local->mad_priv) {
recv_mad_agent = local->recv_mad_agent;
&mad_send_wc);
spin_lock_irqsave(&mad_agent_priv->lock, flags);
- list_del(&local->completion_list);
atomic_dec(&mad_agent_priv->refcount);
if (!recv)
kmem_cache_free(ib_mad_cache, local->mad_priv);
}
}
sg_list.addr = dma_map_single(qp_info->port_priv->
- device->dma_device,
- &mad_priv->grh,
- sizeof *mad_priv -
- sizeof mad_priv->header,
- DMA_FROM_DEVICE);
+ device->dma_device,
+ &mad_priv->grh,
+ sizeof *mad_priv -
+ sizeof mad_priv->header,
+ DMA_FROM_DEVICE);
pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr);
recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list;
mad_priv->header.mad_list.mad_queue = recv_queue;
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